Car truck brake



3 Sheets-Slieet l INVENTOR- fioZerih Jo y BY R. W. JOY

CAR TRUCK BRAKE Filed Sept. 16, 1942 June 26, 1945.

ATTORNEY June 26, 1945. R. w. JOY 2,379,084

CAR TRUCK BRAKE Filed Sept. 16, 1942 3 Sheets-Sheet 2 INVENTOKalert/11:7 W

ATTORNEY June 26, 1945. R. w. JOY 2,379,084

CAR TRUCK BRAKE I Filed Sept. 16, 1942 3 Sheets-Sheet 3 QP INVENTOR flizzg having extremely sharp curves.

Patented June 26, 1945 uN rso s'rr s PATENT orricr.v

CAR TRUCK BRAKE Robert W. Joy, Berwick, Pa, assignor to American Car andFoundry Company, New York, N. Y.', a corporation of New JerseyApplication September 16, 1942, Serial No. 458,485

9 Claims.

This invention relates to brakes in general and in particular to brakesfor use on trucks of small size generally used under mine or otherindustrial cars.

In industrial use the trucks supporting the car bodies must be of assmall and compact a design as possible in order to cut down the wheelbase since in most cases they must operate over tracks Most of thetrackage in mines and industrial plants cannot be located in anyposition giving a large amount of clearance and any truck must bearranged with all parts as compact as possible in order to cleartrackside obstructions. It is an object, therefore, of the presentinvention to provide a car truck and brake requiring a minimum of spaceand with the brake parts located wholly within the clearance line of thetruck.

A further object of the invention is the provision of a brake applicableto trucks of extremely short wheel base.

A still further object of the invention isthe provision of a brakemechanism of extremely simple, strong and rugged construction.

These and other objects of the invention will be apparent to personsskilled in the art from a study of the following description andaccompanying drawings, in which Figure 1 is an elevational view ofsubstantially one-half of the car;

Fig. 2 is an end view of the car shown in Fig. 1;

Fig. 3 is a sectional view taken substantially online 3-3 of Fig. 4;

Fig. 4 is a plan View of the car and truck with parts broken away tobetter disclose the truck construction, and

Fig. 5 is a sectional view taken substantially on line 5-5 of Fig. 3.

Referring now to the drawings in detail, it will be seen that the carbody is composed of sides 2,

ends 4 and multi-level bottom 6. The sides and ends are braced by meansof gussets 8, while the floor is supported by longitudinal members it).The raised end portions of the car bottom are supported onlongitudinally extending draft sills I 2 adapted to receive theautomatic coupler Hi.

Th draft sills also serve as center sills and have,

attached thereto the body center plate It which is adapted to restwithin the truck center plate 58, best shown in Fig. 3. The truck centerplate is supported on a bolster member 29 which in turn is supportedupon springs 22 resting upon a. spring plank element 24,- which elementalso ties the truck side frames rigidly together. The truck side framesare of channel construction having the flanges 26 directed inwardlytoward the center of the car and receiving therebetween bearings 2'!held in place by bolts 28. The bearings are adapted to receive the axlesA which extend through the side frames and are mounted in supportingwheels W. The bearings are preferably located in the wheels and areprotected by the wheel hubs H which define the outer clearance line ofthe truck. Rocking of the car body is controlled by means of sidebearings 3E1 secured to the truck bolster and to plates 3| fastened onthe car body by any suitable means such as welding.

In order to support portions of the brake rigging brackets B areattached to the truck side frames between the spaced wheels W. Each ofthese brackets are formed of a plurality of plates, as clearly shown inFigs. 1, 3 and 4. The bottom plate 32 of the bracket has its inner endsecured to the bottom flange of the truck frame and extends outwardlysubstantially to the clearance limits of the truck. At its outer end ithas attached thereto as by rivets 34 a flange 36 of a upper portion ofthe adjacent truck side frafne by means of a short connecting plate 59.The otherwise free end of flange 42 is attached to leg 36 by means ofrivets 52 extending through the plates and through spacing collars 54;thus firmly attaching the plates together yet holding the flanges inspaced relation to each other. The leg it of the distorted W-shapedplateis provided adjacent its edges with spaced upstanding ears 56 adapted toreceive therebetween a brake hanger link 58 held in position by means ofa bolt 60 extending therethrough and through the ears 56. The lower endsof the brake hangers are connected to brake shoe heads 62 which. in turnhave keyed thereto brake shoes 64. Each of the brake shoe heads isprovided with a curved extension 36, adapted to be engaged by the lowerends of the truck levers later to be described. The truck dead lever 68has its upper end extending between the flanges 32 and t6 and is held inposition by bolt or other means it, while the lower end, as

previously stated, bears against the rounded end of the associate brakeshoe head. The intermediate portion of the dead lever is pin-connectedto one end of a compression link 12, the other end being pin-connectedto the intermediate portion of a floating live lever 14. The pin whichconnects the compression link and live lever is extended into a slot 76formed in the inclined leg 48 of one of the bracket forming plates, thussupporting the lever 14 for translatory movement relative to the plate.As previously stated, the lower end of this live lever bears against therounded end of the associated brake shoe head. The upper ends of thelive levers '14 extend inwardly above the truck side frames and areconnected as by bolts 18 to one end of a pull rod 80, the other end ofwhich is connected by bolts or pins 82 to the end of an equalizer 84.This equalizer is supported by the car body draft or center sillsthrough the medium of slots 85 formed in connected to a rod 94 extendingthrough openings 95 in the side bearing attaching plates 3!. The freeend of the rod 91 is connected to a Chain or other flexible means 96running 'to the endof the car and then around pulley 91 and upwardly forconnection to a spring or other resilient means 98. This spring isconnected to one end of an operating lever B'BpiVoted intermediate itsends o the car end well and adapted to engage a ratchet segment "10located on the car end wall adjacent the handle portion G.

it will be seen from the preceding description 'that an extremely simpleand rigid brake has been provided with all parts located wholly withinthe clearance limits of the truck as defined by the wheel hubs and thatthe truck levers, brake "shoes and hangers are carried by and housedwithin brackets carried by the truck side frames intermediate the spacedwheels. In o eration it will be seen that application of a downwardforce to the handle G will cause movement or the hero. b le means 96 andtransmit a pull causing rotation of lever 90 in a clockwise direction asviewed in Fig. 4. This movement will lace link 38 in compression andforce the equalizer lever 84 toward the center or the car, thus placingpull rods 8!] in tension and rocking the live levers. Since their motionwill be opposed by the associated brake shoe engaging the wheel, thecompression link 12 will transmit power moving the dead lever andforcing its associated shoe into engagement with the adjacent wheel.Full equalization is obtained thrqugh equalizer 84 and through the livelever "M which may pivot as well as slide in slot 16 of the bracketforming plate leg '46. Since the live lever 14 is floating in thebracket a thrust member I02 of angular formation is Welded or otherwisesecured to vertical leg 38 of the distorted W-sh'aped plate previouslyreferred to. This thrust member will take any upward thrust of the livelever and prevent the digging of the live lever end into the bracketforming plate, thereby insuring a smooth motion and proper equalizationbetween the live lever and dead lever. Normally, the brakes will beapplied with sufficient power to extend spring 98 a considerable amountand this spring will constantly urge the brakes toward engaged positionwith the shoes while at the same time preventing breakage of the brakemechanism through application of excessive power. The energy stored inthe stretched spring 98 will, as previously stated, constantly urge thebrakes toward an on position and will hold the brakes in tightengagement with the wheels during swinging of the truck. It is to benoted that the slight tendency towards applying or releasing the brakesoccasioned by the off center relation of the connection between the link88 and lever 90 will be absorbed by the spring without in any waydamaging the brake mechamsm.

While the mechanism has been described more or less in detail withspecific reference to the drawings, it will be obvious that variousmodifications and rearrangements of parts may be made and an suchmodifications and rearrangements of parts are contemplated as will fallwithin the scope of the appended claims defining my inven-' tion.

twist is claimed is:

1. The combination with a car body pivotally mounted on 'a sup ortingtruck including spaced apart wheels and axles, brackets secured to thetruck s'i'de frames and projecting laterally outward into the spacebetween the wheels, brake shoes sup orted by said brackets in positionto engage the wheels, brake levers carried by said brackets andengageable with said brake shoes, said brake levers being inclinedinwardly and upwardly to position their inner ends substantially abovethe truck side frames, and actuatin means carried by the car body andoherabiy connected to the inne'r ends' of said brake levers.

2. The combination with a car body pivotally mounted on a supportingtruck including spaced apart wheels and axles, brackets secured to thetruck side frames and projecting laterally outward into the spacebetween the wheels, brake rigging carried by the car body, and truckcarried brake rigging operably connected to the car body carried brakerigging, said brackets forming the sole support for the entire truckcarried brake rigging.

3. The combination with a car body and a. supporting truck having spacedapart axles and wheels thereon outside the truck heme, brackets securedto the truck frame and projecting laterally thereof into the spacebetween the wheels, brake shoes suspended from said brackets, live anddead levers pivotally carried by said brackets and each bearing on abrake shoe part but free of connection thereto, a compression linkconnecting said live and dead levers, and brake rigging carried by saidcar body and operably connected to said live levers to actuate the same.

4. The'c'oinbination with a car body and a supporting truck havingspaced apart axles and wheels thereon outside the truck frame, bracketssecured to the truck frame and projecting laterally thereof into thespace between the wheels, brake sh'o'es suspended from said brackets,live and dead levers pivotally carried by said brackets and each bearingon a brake shoe part. a compression link connecting said liveand deadlevers, draft sills forming part of said body and slidably carrying -anequalizer bar, tension links connecting said live levers and equalizerbar, and body carried mechanism for causing movement of said equalizerbar and thereby control said brake shoes.

5. The combination with a car body and a supporting truck having spacedapart axles and wheels thereon outside the truck frame, a bracketsecured to the truck frame and projecting laterally thereof into thespace between the wheels, brake shoes suspended from said bracket, adead lever pivotally carried by said bracket and bearing on the adjacentbrake shoe, a live lever pivotally and slidably mounted on said bracketand bearing on the brake shoe adjacent thereto, a compression linkconnecting said levers for joint operation,

and body carried mechanism connected to said live lever to actuate thesame and thereby control said brake shoes.

6. The combination with a car body and a supporting truck having spacedapart axles and wheels thereon outside the truck frame, Spaced platessecured to the truck frame and forming a bracket projecting laterally ofthe truck frame into the space between the wheels, brake shoes carriedby said bracket, connected live and dead levers pivotally carried andhoused by the spaced forming the bracket, and body carried mechanismconnected to said live lever to actuate the same and thereby controlsaid brake shoes.

8. The combination with a car body and a supporting truck having spacedapart axles and Wheels thereon outside the truck frame, spaced platessecured to the truck frame and forming a bracket-projecting laterally ofthe truck frame into the space between the wheels, vertically extendinglinks suspending brake shoes from said bracket for swinging movementbetween the spaced plates, at least one of said spaced plates being cutto permit lateral removal of the brake shoes when disconnected,connected live and dead levers carried by the bracket and bearing attheir lower ends on said brake shoes, said levers being inclinedinwardly and upwardly of the truck side on said brake shoes, said leversbeing inclined inwardly and upwardly of the truck side frame and atleast in part housed by said spaced plates frame and at least in parthoused by said spaced plates forming the bracket, and body carriedmechanism connected to said live lever to actuate the same and therebycontrol said brake shoes.

9. The combination with a car body and a supporting truck having spacedapart axles and wheels thereon outside the truck frame, spaced platessecured to the truck frame and forming a bracket projecting laterally ofthe truck frame into the space between the wheels, brake shoes carriedby said bracket andlaterally removable therefrom, connected live anddead levers pivotally carriedand housed by the spaced plates forming thebracket, and body carried mechanism connected to said live lever toactuate the same and thereby control said brake shoes.

ROBERT W. JOY.

